SUTRO BIOPHARMA, INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Chung Jane | Chief Executive Officer | Option Exercise | 2,500 | — | — | 14,785 | Dec 12, 2025 |
| Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Purchase | 17,000 | $0.80 | $13,600 | 71,832 | Oct 15, 2025 |
| Chow Gregory K. | CFO | Purchase | 19,750 | $0.81 | $15,998 | 19,750 | Oct 15, 2025 |
| Chung Jane | Chief Executive Officer | Purchase | 12,500 | $0.80 | $10,000 | 122,850 | Oct 15, 2025 |
| MATSUI CONNIE | — | Purchase | 50,000 | $0.80 | $40,000 | 50,000 | Oct 15, 2025 |
| Pauling David | Chief Admin. Ofcr. & GC | Purchase | 12,504 | $0.80 | $10,003 | 71,737 | Oct 15, 2025 |
| Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Tax Withholding | 13,417 | $0.90 | $12,075 | 54,832 | Sep 18, 2025 |
| Chung Jane | Chief Executive Officer | Tax Withholding | 6,708 | $0.80 | $5,366 | 110,350 | Aug 9, 2025 |
| Leyman Barbara | Chief Business Officer | Tax Withholding | 8,944 | $0.78 | $6,976 | 16,056 | Jul 8, 2025 |
| ALBINI EDWARD C | CFO AND SECRETARY | Option Exercise | 9,125 | — | — | 176,800 | May 15, 2025 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Option Exercise | 13,140 | — | — | 127,438 | May 1, 2025 |
| Srinivasan Venkatesh | CHIEF TECH OP OFFICER | Tax Withholding | 894 | $1.07 | $957 | 53,686 | May 1, 2025 |
| Borgman Anne Elizabeth | CHIEF MEDICAL OFFICER | Tax Withholding | 24,709 | $1.07 | $26,439 | 97,452 | May 1, 2025 |
| Srinivasan Venkatesh | CHIEF TECH OP OFFICER | Tax Withholding | 7,603 | $0.60 | $4,562 | 52,080 | Apr 11, 2025 |
| NEWELL WILLIAM J | CEO | Tax Withholding | 6,708 | $1.36 | $9,123 | 292,531 | Mar 5, 2025 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Option Exercise | 8,750 | — | — | 99,027 | Mar 5, 2025 |
| ALBINI EDWARD C | CFO AND SECRETARY | Tax Withholding | 3,594 | $1.36 | $4,888 | 132,081 | Mar 5, 2025 |
| ALBINI EDWARD C | CFO AND SECRETARY | Option Exercise | 9,125 | — | — | 130,673 | Mar 4, 2025 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Tax Withholding | 3,748 | $1.42 | $5,322 | 90,277 | Mar 4, 2025 |
| NEWELL WILLIAM J | CEO | Tax Withholding | 11,136 | $1.42 | $15,813 | 280,489 | Mar 4, 2025 |
| Chung Jane | PRESIDENT AND COO | Tax Withholding | 2,334 | $1.42 | $3,314 | 98,308 | Mar 4, 2025 |
| ALBINI EDWARD C | CFO AND SECRETARY | Option Exercise | 17,250 | — | — | 131,868 | Mar 1, 2025 |
| Chung Jane | PRESIDENT AND COO | Option Exercise | 25,000 | — | — | 102,217 | Mar 1, 2025 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Option Exercise | 13,400 | — | — | 93,227 | Mar 1, 2025 |
| Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Tax Withholding | 4,621 | $1.59 | $7,347 | 30,749 | Mar 1, 2025 |
| NEWELL WILLIAM J | CEO | Option Exercise | 23,750 | — | — | 243,953 | Mar 1, 2025 |
| Srinivasan Venkatesh | CHIEF TECH OP OFFICER | Tax Withholding | 4,672 | $1.59 | $7,428 | 38,433 | Mar 1, 2025 |
| Borgman Anne Elizabeth | CHIEF MEDICAL OFFICER | Tax Withholding | 4,621 | $1.59 | $7,347 | 53,098 | Feb 28, 2025 |
| Chung Jane | PRESIDENT AND COO | Option Exercise | 25,000 | — | — | 79,262 | Dec 1, 2024 |
| Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Tax Withholding | 13,380 | $3.95 | $52,851 | 24,120 | Sep 18, 2024 |
| Chung Jane | PRESIDENT AND COO | Option Exercise | 18,750 | — | — | 60,951 | Aug 9, 2024 |
| Srinivasan Venkatesh | CHIEF TECH OP OFFICER | Tax Withholding | 892 | $3.74 | $3,336 | 31,730 | May 1, 2024 |
| Srinivasan Venkatesh | CHIEF TECH OP OFFICER | Option Exercise | 21,250 | — | — | 37,704 | Apr 11, 2024 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Tax Withholding | 3,108 | $4.54 | $14,110 | 72,952 | Mar 5, 2024 |
| NEWELL WILLIAM J | CEO | Tax Withholding | 6,690 | $4.54 | $30,373 | 220,203 | Mar 5, 2024 |
| ALBINI EDWARD C | CFO AND SECRETARY | Option Exercise | 8,750 | — | — | 109,843 | Mar 5, 2024 |
| NEWELL WILLIAM J | CEO | Tax Withholding | 11,105 | $4.79 | $53,193 | 208,143 | Mar 4, 2024 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Tax Withholding | 3,739 | $4.79 | $17,910 | 67,310 | Mar 4, 2024 |
| Chung Jane | PRESIDENT AND COO | Tax Withholding | 2,209 | $4.79 | $10,581 | 42,201 | Mar 4, 2024 |
| ALBINI EDWARD C | CFO AND SECRETARY | Tax Withholding | 3,472 | $4.79 | $16,631 | 101,093 | Mar 4, 2024 |
| Srinivasan Venkatesh | CHIEF TECH OP OFFICER | Tax Withholding | 2,049 | $4.95 | $10,143 | 16,454 | Mar 1, 2024 |
| NEWELL WILLIAM J | CEO | Tax Withholding | 8,559 | $4.95 | $42,367 | 188,123 | Mar 1, 2024 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Tax Withholding | 2,511 | $4.95 | $12,429 | 61,924 | Mar 1, 2024 |
| Chung Jane | PRESIDENT AND COO | Tax Withholding | 2,038 | $4.95 | $10,088 | 36,535 | Mar 1, 2024 |
| ALBINI EDWARD C | CFO AND SECRETARY | Tax Withholding | 3,227 | $4.95 | $15,974 | 95,440 | Mar 1, 2024 |
| Borgman Anne Elizabeth | CHIEF MEDICAL OFFICER | Option Exercise | 37,500 | — | — | 37,500 | Feb 29, 2024 |
| NEWELL WILLIAM J | CEO | Option Exercise | 13,750 | — | — | 178,566 | Jan 29, 2024 |
| ALBINI EDWARD C | CFO AND SECRETARY | Tax Withholding | 2,151 | $4.99 | $10,733 | 90,792 | Jan 29, 2024 |
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | Option Exercise | 8,250 | — | — | 60,940 | Jan 29, 2024 |
| Vasquez Nicki | CHIEF PORT. STRAT & ALNCE OFCR | Sale | 12,185 | $5.00 | $60,925 | 12,803 | Jan 29, 2024 |